These cartridges always work perfectly and last longer than what they say they will last. Our laser printer takes 4 different ones, so it can get costly to maintain due to the cost of the cartridges...however with the life lasting longer, they are worth it. I have tired the generic cartridges and did not have as good of luck and would not recommend. As a Staples reward member, you always receive special promotions and discounts so this can make the purchase of these much more affordable, and as a bonus you get points for buying them which allows you to use toward future purchase...it is a great program!